The objective of this observational study is to evaluate the effectiveness of the dietary supplementation "OnLife" in improving signs and symptoms of chemotherapy-induced peripheral neuropathy (CIPN) in adult patients who have finished adjuvant oxaliplatin-containing regimen (colon cancer) or adjuvant paclitaxel regimen (breast cancer). Furthermore, patient-reported outcomes (PROs) and concomitant medication used for the treatment of neuropathic pain will be assessed.